short for drum 'n' bass. a style of electronica that incorporates fast tempos (150~180 bpm) syncopated breakbeats, and a heavy bassline. can incorporate various styles of other music; jazz, funk, hip-hop, are the most common. Sometimes called the 'black man's techno'. often times the word is used interchangibly with jungle, but a lot of people think that jungle and dnb are different. sub-genres include ambient dnb, techstep, 2-step, darkstep, etc. a man named roni size, who isn't that popular now, basically started the whole style of music. its cool.
if you want to hear some dnb, check out:

www.bassdrive.com
or
www.nycjungle.com

i went to a dnb rave by J. Majik and i had a blast.
by karl June 08, 2004
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Abbreviation for Drum & Bass.

See also d'n'b
You goin' to that dnb session down in Camden tonight?
by Bruce Lee March 30, 2003
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Do Nothing Bitch. Popularized by Ronda Rousey in a video leading up to her fight in UFC 190, where she said, "I have this one term for the kind of woman that my mother raised me to not be. I call it a 'do-nothing bitch'. Or, I call it a 'DNB' a lot of the time. She's a bitch who just tries to be pretty and be taken care of by someone else"
The only time that DNB stepped in a gym it was to use the mirror for her makeup.
by nikehat August 16, 2015
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1. Drum aNd Bass
2. Did Not Bat or Did Not Bowl
- Cricket Terminology
1. "There's a DNB party at 'Candy's' in Kings Cross."
2. When Hayden scored 380 runs in a recent test match, players such as Brett Lee, Did Not Bat (DNB).
by Diego November 06, 2003
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if you think its shit then you've only listened to it on the radio where it is.
roni size is a good man.
even better is squarepusher who isnt a drum n bass person but makes the most incredible drum n bass.
erm....drum drum drum, bass bass bass
god this drum n bass is banging
by rathsangatas drink November 01, 2004
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Den Norske Bank

The Norwegian name for "The Norwegian Bank", which has been around longer than the genre of music.
I went to DNB last night to withdraw some money.
by Quakeulf January 15, 2006
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Short for "do nothing bitch", as described by UFC fighter Ronda Rousey
“I have this one term for the kind of woman my mother raised me to not be, and I call it a do nothing bitch. A DNB. The kind of chick that just tries to be pretty and be taken care of by someone else. That’s why I think it’s hilarious if my body looks masculine or something like that. Listen, just because my body was developed for a purpose other than fucking millionaires doesn’t mean it’s masculine. I think it’s femininely badass as fuck because there’s not a single muscle on my body that isn’t for a purpose, because I’m not a do nothing bitch. It’s not very eloquently said but it’s to the point and maybe that’s just what I am. I’m not that eloquent but I’m to the point.” - Ronda Rousey
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